function getTokens(rawString) {
  // NB: `.filter(Boolean)` removes any falsy items from an array
  return rawString.toLowerCase().split(/[ ,!.";:-]+/).filter(Boolean)

  //this line returns the rawString array and greats a boolean
  //for the symboles in the text.

  .sort();
}

function mostFrequentWord(text) {
  let words = getTokens(text);
  let wordFrequencies = {};
  for (let i = 0; i <= words.length; i++) {
    if (words[i] in wordFrequencies) {
      wordFrequencies[words[i]]++;
    } else {
      wordFrequencies[words[i]] = 1;
    }
  }

  //a variable for words was created in line 12 and is given the value of getTokens, in line 14 if the frequent words of (i) exceeds 0 then the words doesn't get a token. unless the wordFrequent is greater than 1  then words get a token.

  let currentMaxKey = Object.keys(wordFrequencies)[0];
  let currentMaxCount = wordFrequencies[currentMaxKey];

  //the variable currentMaxKey and currentMaxCount is given functions.

  for (let word in wordFrequencies) {
    if (wordFrequencies[word] > currentMaxCount) {
      currentMaxKey = word;
      currentMaxCount = wordFrequencies[word];
    }
  }
  return currentMaxKey;
}
//if the wordFrequencies is greater than the currentMaxCount then the currentMaxKey gets a token.